Ichiwa-kai

The Ichiwa-kai was a short-lived yakuza organization that split from the main Yamaguchi-gumi clan on 13 June 1984 and made Osaka, Japan its base. The gang was led by Hiroshi Yamamoto, who had 10,000 followers. In 1985, he had his rival Masahisa Takenaka assassinated, leading to a war with the Yamaguchi-gumi that forced him to retire in 1989, disbanding the Ichiwa-kai.